{Thanks for the offer, but I'll have to pass.}

Open world PVP would be such a mess, and it would likely be MSQ restricted. No done with the MSQ? No Open World PVP for you.

Also they would have to restrict BLU, cause man, you would just get annihilated if you had to fight one on any job. Even level 80s... BLU could just pre-buff and one shot with Final Sting. Oh wait, BLU would probably get excluded yet again if this came to pass... good thing it won't though.

Pretty sure duels at Wolf's Den is as close as they're ever gonna get. You can always challenge people to go there and fight you.